Features: 1.Simple operation, put on a cup of hot water, preheat for 30 seconds to 1 minute, turn the flywheel clockwise to start, the engine will automatically rotate. 2.The low temperature stirling engine converts thermal energy into mechanical kinetic energy of the stirling engine. 3.Through hands-on operation, you can observe the entire engine running process, more intuitively master the working principle of the low temperature Stirling engine, and deepen your interest in physics. 4.This product requires less maintenance, more efficient and quieter. 5.The product has been assembled and can be used directly. specification: Simple operation, put on a cup of hot water, preheat for 30 seconds to 1 minute, turn the flywheel clockwise to start, the engine will automatically rotate. The low temperature stirling engine converts thermal energy into mechanical kinetic energy of the stirling engine. Through hands-on operation, you can observe the entire engine running process, more intuitively master the working principle of the low temperature Stirling engine, and deepen your interest in physics. This product requires less maintenance, more efficient and quieter. The product has been assembled and can be used directly. Exquisite metal body, simple structure, reliable and quality. : Condition: Brand New Item Type: Stirling Engine Material: Metal Color: As picture Package List: 1 x Low Temperature Stirling Engine Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.